Multi-Functional Skin Care Roller for Needle-Free Dermal Delivery

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Solution Overview

Problem

Existing skin care devices are large, complicated, and difficult to use, limiting their effectiveness and convenience for general users, and they often fail to penetrate active ingredients into the dermal layer without damaging the skin.

Innovation Solution

A multi-functional portable skin care device that uses electric current, light wave, and vibration to penetrate active ingredients into the dermal layer without harm, featuring a roller unit with conductive rollers, a connecting unit, and a main body unit with a control circuit board to manage power and stimulation modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If fine needles are used to penetrate the epidermal layer, then cosmetics can be delivered to the dermal layer, but the skin may be damaged

Engineering Contradiction:
Improvecosmetic delivery precisionVSAvoidskin damage
Core Design Contradiction:
Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical needle penetration system with an electrical stimulation system. Instead of using fine needles to physically pierce the skin, the device uses electric current to create ion channels through electroporation, allowing cosmetic ingredients to penetrate the epidermal layer without mechanical damage. This substitution of mechanical action with electrical action resolves the contradiction between achieving deep penetration and avoiding skin damage.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If electric current is used to promote cosmetic absorption, then high-molecular substances can pass through cell membranes, but the device complexity increases

Engineering Contradiction:
Improvecosmetic absorption capabilityVSAvoiddevice structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent integrates multiple functions into a single handheld device: it combines electroporation electrodes for cosmetic penetration, EMS electrodes for muscle stimulation, and a roller mechanism for application. This multi-functional integration allows the device to perform various skin care functions (cosmetic delivery, muscle stimulation, hydration) without requiring multiple separate devices, thereby managing complexity while enhancing versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the electroporation function, EMS function, and cosmetic application function into one unified device structure. The roller unit combines conductive rollers for electroporation with EMS electrodes and a cosmetic reservoir, allowing all functions to be performed by a single device rather than requiring separate treatments or devices for each function.

Inventive Principle:
Principle #5Merging (Combining)

3Adaptability or versatility

If mask-type light-irradiating devices are used, then skin care can be performed while wearing the device, but portability and ease of use are reduced

Engineering Contradiction:
Improveskin care functionalityVSAvoidportability
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent divides the skin care treatment into modular components: a handheld roller unit that can be easily maneuvered on different facial areas, a detachable cosmetic reservoir, and integrated electrodes. This segmentation allows the device to be portable and easy to operate while maintaining multiple skin care functions, unlike bulky mask-type devices that require the user to remain stationary and wear the entire apparatus.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS12357528B2Multi-functional portable skin care device
Publication Date: 2025.07.15 JNL CO LTD
  • US12357528B2 patent drawing
  • US12357528B2 patent drawing
  • US12357528B2 patent drawing

AI summary

A multi-functional portable skin care device includes: a roller unit including a first roller and a second roller and an insulating ring member; a connecting unit including a shaft member passing through centers of the first and second rollers and the insulating ring member, a conductive pipe coupled to the rear end of the shaft member and electrically connected to any one of the first and second rollers, and a conductive rod installed along the hollows of the conductive pipe and the shaft member and electrically connected to any one of the first and second rollers; and a main body unit connected to the roller unit, a battery installed inside the main body case, a control circuit board for controlling power supplied to the first and second rollers, a control button for selecting current supplied to the first and second rollers, and an LED display for displaying the operating state.